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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
#include <algorithm>
#include <cstddef>
#include <deque>
#include <iterator>
#include <list>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
#include "../../GenerateInput.h"
int main(int argc, char** argv) {
auto std_transform = [](auto first, auto last, auto out, auto f) { return std::transform(first, last, out, f); };
// {std,ranges}::transform(normal container)
{
auto bm = []<class Container>(std::string name, auto transform) {
benchmark::RegisterBenchmark(
name,
[transform](auto& st) {
std::size_t const size = st.range(0);
using ValueType = typename Container::value_type;
Container c;
std::generate_n(std::back_inserter(c), size, [] { return Generate<ValueType>::random(); });
std::vector<ValueType> out(size);
auto f = [](auto element) {
benchmark::DoNotOptimize(element);
return element;
};
for ([[maybe_unused]] auto _ : st) {
benchmark::DoNotOptimize(c);
benchmark::DoNotOptimize(out);
auto result = transform(c.begin(), c.end(), out.begin(), f);
benchmark::DoNotOptimize(result);
}
})
->Arg(32)
->Arg(50) // non power-of-two
->Arg(1024)
->Arg(8192);
};
bm.operator()<std::vector<int>>("std::transform(vector<int>) (identity transform)", std_transform);
bm.operator()<std::deque<int>>("std::transform(deque<int>) (identity transform)", std_transform);
bm.operator()<std::list<int>>("std::transform(list<int>) (identity transform)", std_transform);
bm.operator()<std::vector<int>>("rng::transform(vector<int>) (identity transform)", std::ranges::transform);
bm.operator()<std::deque<int>>("rng::transform(deque<int>) (identity transform)", std::ranges::transform);
bm.operator()<std::list<int>>("rng::transform(list<int>) (identity transform)", std::ranges::transform);
}
benchmark::Initialize(&argc, argv);
benchmark::RunSpecifiedBenchmarks();
benchmark::Shutdown();
return 0;
}
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